Edmund jansen



(No Model.)

B. JANSEN.

POGKET KNIFE. No. 399,047 Patented Mar. 5, 1889.

We in esyes l wenor UNITED STATES PATENT @EETEE.

EDMUND JANSEN, OF SOIIINGEN, PRIISSIA, GERMANY.

POCKET-KNlFE.

SPECIFICATION forming part of Letters Patent N 0. 399,047, dated March 5, 1889.

Application filed September 19, 1888.

To (@ZZ whom it may concern:

' in it known that I, EDMUND JANSEN, mannl'actnrer, a subject of the King of Prussia, German lSlmperor, residing at Solingen, in the Kingdom of Prussia, German Empire, have invented certain new and useful Improvements in Pocket-Knives, of which the following is a specification.

M y invention relates to and about pocket knives 5 and it consists in the manner of bolding the blades in their open position by-a slide, and thus doing away with the usual backspring and allowing of a simple fixing of the blade.

In order to make my invention more clear, I refer to the accompanying drawings, which form part of this present application, and in which similar letters denote similar parts throughout the different figures.

I ign re 1 is a longitudinal section of my improved pocket-knife when closed. Fig. 2 is a longitudinal section of the same with the slide released to allow of the blade being opened. Fig. 3 is a longitudinal section of the same with the blade full open and fastened in that position by means of the slide 1). Fig. l a back view of the knife when open. Fig. 5 shows a modification of the manner of holding the slide 12 in its shut and open positions by a groove, "1:, and shows the blade fastened when in its open position. Fig. 6 is the same, but with the slide Z) drawn back, so as to allow of the blade being closed.

The knife is of the common form and construction, and consists of a usual knife-case, (I, of any desirable material, and of theknit'e blade or blades a, hinged at s to the case. A

guide-piece, f, is secured to the back of the blade d by way of dovetail.

cured to this guide-piece.

The slide 1) may be l'n'ought into the posi- 1 A slide, Z), is se- 5 fierial No. 285,780. (No model.)

tions as illustrated in Iiigs. 1 and In the position Fig. 1 the blade is seen red in its closed state. In the position Fig. 2 the knife may be opened.

The slide I) only allows the opening of the knife when in the position Fig.

In the opened state of the blade (I the slide 1) is shoved in the right-hand direction, as illustrate] in Fig. 3, and the blade is secured in the simplest and easiest manner. The hook 1* may be added for extra security. This construction offers complete security against unintended opening or closing of the blade, and by dispensing with the baclesprin g the manufacture of my improved knives becomes less expensive. I state, finally, that the beforedescribed arrangement may be used in connection with any desirable form of pocketknives.

lilaving'i'ully d esoribed my in vcntion, what I desire to claim and secure by Letters Patent of the United States is 1. In pocket-knives, the combination of a hasp, (1, blade (I, and sliding clasp I), the said clasp 1) being loosely fastened to the blade (L and sliding over the end of the clasp (I, so as to keep the blade from accidentally opening or shutting, substantially as described.

2. In pocket-knives, the combination of a hasp, (7, blade having a hook, l7, and slid ing clasp Z), the said clasp l) heingloosely ened to the back of the blade (4 by the guidepiece f, so as to slide over thecnd of thecaap (l, substantially as and for the purpose described.

In witness whereof I have hereunto set my hand in presence of two witnesses.

EIHHIND .IANSEN.

\Yitnesses:

*ZRNsr PEREs, GUSTAV Evnn'rz. 

